by grinsegold » Thu Dec 21, 2017 11:36 am
First let me mention that this seems to be a problem, so why not placing your question in the section "Bugs, problems, feature requests"?, but apart from that let's start getting this solved now.
Select the eyes, go in edit mode (maybe also press numpad-slash to get into local view), then deselect all vertices by pressing "a" once or twice. Notice that each eye consists of two layers - the outer one gets its "texture" from the transparent area of the eye-texture, meaning that this part of the mesh will be transparent, while the second shell will be the white sclera and the iris+pupil. Now hover over the inner shell and press "L". When both inner shells are selected, press "P" and confirm "by selection". When you now leave edit mode, you will notice that you have two eye objects now, "High-poly" and "High-poly.001". With "High-poly" still selected, go to the material tab, press the button that sais "Mixshader" and change it to "Principled". Next, hit the square grey button next to "Base Col" and select "Image Texture". A texture slot appears. Click on the up/down arrow-button and select the eye-texture .
Now select "High-poly.001" and change also the shader, but this time not to "Principled", but to "Glass". Make sure the color within the glass-shader is purely white.
Done